Every rental company eventually books more of something than it owns. You take the order anyway, call the company across town, and they cover the difference. That part is normal. The part that goes wrong is everything after the phone call.

This walks through how RentKit's sub-rental tracking works, from the moment an item goes short to the moment it is sitting in your warehouse ready to load - vendor setup, the automatic shortage flag, the request, the status changes, and the handoff to the crew pulling inventory that morning.

Key takeaways

RentKit flags a sub-rental the moment an order pushes an item negative for a given day, tied to the order that caused it.
Vendors are set up once under Admin and are then available on any sub-rental request.
You can email the request from inside RentKit or call the vendor and log it after. Either way the order gets tagged.
Statuses run requested, pending, approved, fulfilled - so nobody has to ask where it stands.
Approved sub-rentals show up in the prep items calendar the warehouse already checks every day.

The problem is not the sub-rental. It is everyone else.

Whoever books the sub-rental knows the item, the date, and the quantity. That is the easy part. The people who need that information are somewhere else entirely.

The crew pulling for Saturday sees a shortage and has no idea whether it is a problem or already handled. Has anyone called? Did the vendor actually confirm? Is it arriving Friday afternoon or Saturday at 6am? Without somewhere shared to put that, the answers live in a text thread, and a delivery goes out short because one link in the chain was on a job site and never replied.

Sub-renting also does not stop once you grow. Plenty of operators with warehouses full of inventory still sub-rent specialty items and overflow every season. It is a permanent workflow, not a startup phase.

How it works, step by step

Step 1: Add your vendors

Sub-rental tracking starts with vendor setup. Under Admin, Vendors, you add each company you work with - name, contact email, phone number - the same way you would add a venue or a truck.

That is all the setup required. Once a vendor exists, it is available to pick on any sub-rental request - you do not have to map vendors to inventory before you can use them. Most operations end up working with different vendors for different categories anyway: one company for tables and chairs, someone else entirely for generators or lighting.

Step 2: RentKit flags the shortage on its own

When an order pushes an item into negative inventory - you own one, two are booked for the same day - a sub-rental icon appears on that item. You are not running a report to go find it. It surfaces on the item, tied to the day and the order that caused it.

From there you can check linked or substitute items first, in case you can cover it with something you already own, or go straight into sub-renting for that item and date.

Step 3: Send the request, or log the phone call

From the shortage screen, pick a vendor and send the request without leaving RentKit. It fills in the vendor's email, a subject line, and a message with the exact item and dates, ready for you to review before it goes.

If your team would rather just call - and plenty would - do that instead and log the request afterward. Both paths tag the order as a sub-rental request, so it shows up the same way no matter how the conversation actually happened.

Step 4: Track it from pending to approved

A logged request sits as requested and pending, which is RentKit's way of saying the vendor has not confirmed yet. That distinction matters: pending is not the same as handled, and it should not look like it on the order.

When the vendor confirms, mark it approved right on the order - in full, or partially if they can only cover some of it. That status change is what releases the sub-rental into fulfillment.

Step 5: It lands in the warehouse's prep calendar

Approved sub-rentals appear automatically in the prep items calendar your warehouse staff already use to pull for upcoming orders. Nobody has to be told separately.

A short item shows flagged on the day it is needed. Clicking into that day shows whether the sub-rental has been requested, approved, or already fulfilled. When the vendor's truck shows up, staff confirm the item is on hand and mark it complete on the prep items report, which closes the loop between the original shortage and an item that is genuinely ready to go out.

What this actually changes

Handled this way, a sub-rental never depends on someone remembering to tell the warehouse. The person who booked it has a record of who was contacted and what they agreed to. The crew sees which items are short, which are on order, and which have arrived - inside the calendar they already open every morning, not in a message they have to go find.

The practical result is that taking an order bigger than your inventory stops being a risk one person carries in their head.

Frequently asked questions

How does RentKit know an item needs to be sub-rented?

It flags automatically. When an order pushes an item's inventory negative for a given day, meaning more units are booked than you own, a sub-rental icon appears on that item.

Do I have to link vendors to inventory items first?

No. A vendor only needs to exist - added once under Admin, Vendors, with a company name, email, and phone number. From then on it shows up as an available sub-rental vendor. There is no mapping step standing between you and your first request.

Can I request a sub-rental without sending an email from RentKit?

Yes. If the request happens over the phone, log it in RentKit afterward. It still tags the order as a sub-rental and tracks it from pending through approved and fulfilled, exactly like an emailed request.

How does the warehouse team find out about a sub-rental?

Approved sub-rentals flow into the prep items calendar the warehouse already uses. The shortage appears flagged on the day it is needed, along with whether it has been requested, approved, or fulfilled. No separate message required.

What is the difference between pending and approved?

Pending means the request has gone out but the vendor has not confirmed. Approved means they have confirmed availability, in full or in part, and the item is on track to be fulfilled for that order.

Does the sub-rental cost get tracked against the job?

Yes. What you paid the vendor is recorded against the order, so the margin on that job reflects what it actually cost you to fill rather than assuming every item came off your own shelf.

Tracking Sub-Rental Items: How RentKit Handles the Stuff You Don't Own